Vue.js · question
Q.07 of 102
How does `v-for` work and what are its best practices?
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Re-explain
v-for renders lists of elements based on source data:
<!-- Array iteration -->
<li v-for="item in items" :key="item.id">{{ item.name }}</li>
<!-- Object iteration -->
<li v-for="(value, key) in object" :key="key">{{ key }}: {{ value }}</li>
<!-- Number iteration -->
<span v-for="n in 10" :key="n">{{ n }}</span>
Best practices:
- Always use
:key with unique, stable identifiers
- Avoid using index as key when list can change
- Don't use
v-for and v-if on the same element
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